One major leader of this group was renowned for his introduction of firing slits for artillery in the best
 known military formation of this group, a circle of war wagons. Before her capture, Joan of Arc planned to
 lead a crusade to bring this group back into the fold. A Compacta of reconciliation 
One major leader of this group was renowned for his introduction of firing slits for artillery in the best
 known military formation of this group, a circle of war wagons. Before her capture, Joan of Arc planned to
 lead a crusade to bring this group back into the fold. A Compacta of reconciliation with this group was
 settled after their losses at Grotniki and Lipany. The blind general Jan Zizka led this group, which consisted
 of the radical Taborites and moderate Utraquists. Its formation came with the support of Sophia and her
 husband King Wenceslaus, who were outraged at the death of its namesake as decreed by the Council of
 Constance. For 10 points, identify this group that fought the Holy Roman Emperor to avenge the death of a
 Czech follower of John Wycliffe.
One major leader of this group was renowned for his introduction of firing slits for artillery in the best
 known military formation of this group, a circle of war wagons.
Hussites